SCULPTING - Blender 2.8 "emulate 3 button mouse" disables ALT+LMB
Solved it by remapping the 3D view global Alt+LMB  to Alt + RMB 
Go to Blender Preferences -&gt; Keymap -&gt; 3D View -&gt; 3D View (Global) and Scroll down to find a Select keymap box that has Alt+LMB  as keymap (it should be a few lines above the Box Select keymap).
Change the Alt+LMB  to Alt + RMB  instead.
Solved the issue for now. Not sure if this keymap was important for any other workspaces, but skimmed through the global keymap sections and could not spot one in any of the other sections.